Data / Federal rules / 2025-13328

Air Plan Approval; Guam; Base Year Emissions Inventory for the 2010 1-Hour Sulfur Dioxide National Ambient Air Quality Standard for the Piti-Cabras Nonattainment Area

The Environmental Protection Agency published this final rule in the Federal Register on July 16, 2025. It took effect on October 14, 2025. Comments closed on August 15, 2025.

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What the agency says

The Environmental Protection Agency (EPA) is taking direct final action to approve a revision to Guam's State Implementation Plan (SIP) under section 110(k)(3) of the Clean Air Act (CAA or "the Act"). This revision concerns the base year emissions inventory for the Piti-Cabras, Guam sulfur dioxide (SO<INF>2</INF>) nonattainment area ("Piti-Cabras area" or NAA) for the 2010 1-hour SO<INF>2</INF> National Ambient Air Quality Standard (NAAQS, "standard," or "2010 SO<INF>2</INF> NAAQS").

Key facts

Document number: 2025-13328
Type: Final rule
Action: Direct final rule
Agency: Environmental Protection Agency
Published: July 16, 2025
Takes effect: October 14, 2025
Comments due: August 15, 2025
Dates: This rule is effective October 14, 2025 without further notice, unless the EPA receives adverse comments by August 15, 2025. If we receive such comments, we will publish a timely withdrawal in the Federal Register to notify the public that this direct final rule will not take effect.
Docket: EPA-R09-OAR-2025-0268; FRL-12868-02-R9
Code of Federal Regulations: 40 CFR 52
Topics: Air pollution control; Environmental protection; Incorporation by reference; Intergovernmental relations; Sulfur oxides
Pages: 5

The document on federalregister.gov PDF

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Everything from the Environmental Protection Agency · Rules on air pollution control · Rules on environmental protection · Rules on incorporation by reference · Published in July 2025

Read from the Federal Register API, last updated 2026-10-23. The document on federalregister.gov is the official record; dates and dockets can change through later corrections. Free to reuse with credit to SpecStream under CC BY 4.0.